YashJain/Multi-Object-HOI

Key Features

• 1,718 multi-object sequences with 2 simultaneous objects
• 3,436 processed motion files (1 per object)
• 11 object pair types: box+table, chair+table, monitor+desk, etc.
• Spatial relations: ON, NEAR, AT
• Format: motion.npy [T-1, 962] = human[476] + object[486]

Dataset Statistics

{
    'total_sequences': 1718,
    'total_motion_files': 3436,
    'avg_sequence_length': 195.0 frames,
    'processing_time': '101.7s',
    'gpu_accelerated': True,
    'validation_pass_rate': '100%'
}

Data Format

Each sequence directory contains:

sequence_name_obj1/
├── motion.npy      # [T-1, 962] human + object motion
├── object.npz      # angles[T-1,3], trans[T-1,3], name
└── text.txt        # Text description

Motion representation [T-1, 962]:

• [0:476] - Human motion (positions, velocities, foot contacts)
• [476:962] - Object motion (rotation, translation, velocities, contact distances)

Source Data

Composed from InterAct dataset single-object sequences using spatial composition rules.

Spatial Composition

Objects are positioned using relation rules:

• ON: Object1 placed on top of Object2 (e.g., box on table)
• NEAR: Objects side-by-side at same height (e.g., chair near table)
• AT: Object1 positioned in front of Object2 (e.g., chair at desk)

License

MIT License